Balanced dual-segment cylindrical dielectric resonator antennas for ultra-wideband applications

Asmaa H. Majeed; Abdulkareem S. Abdullah; Khalil Hassan Sayidmarie; Raed A. Abd-Alhameed; Fauzi Elmegri; James M. Noras

Balanced dual-segment cylindrical dielectric resonator antennas for ultra-wideband applications

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Author(s): Asmaa H. Majeed ¹ ; Abdulkareem S. Abdullah ¹ ; Khalil Hassan Sayidmarie ² ; Raed A. Abd-Alhameed ³ ; Fauzi Elmegri ³ ; James M. Noras ³
- Affiliations: 1: Department of Electrical Engineering, College of Engineering, Basrah University., Basrah, Iraq ;
  2: Department of Communication Engineering, College of Electronic Engineering, University of Ninevah, Mosul, Iraq ;
  3: School of Engineering and Informatics, University of Bradford, Richmond Road, Bradford BD7 1DP, UK
Source: Volume 9, Issue 13, 22 October 2015, p. 1478 – 1486
DOI: 10.1049/iet-map.2015.0221 , Print ISSN 1751-8725, Online ISSN 1751-8733

Received 15/01/2015, Accepted 08/06/2015, Revised 24/05/2015, Published 23/07/2015

This study reports on balanced dual-segment cylindrical dielectric antennas with ultra-wideband (UWB) operation. A T-shaped slot and L-shaped microstrip feeding line was suggested to furnish a balanced coupling mechanism for feeding two DRAs, and then the performance of the proposed antenna was analysed and optimised against the target frequency band. The proposed antenna was then modified by adding a C-shaped strip to increase the gain. The performances of both balanced antennas were characterised and optimised in terms of antenna reflection coefficient, radiation pattern, and gain. The antennas cover the frequency range from 6.4 to 11.736 GHz, which is 58.7% bandwidth. A maximum gain of 2.66 dB was achieved at a frequency of 7 GHz with the first antenna, with a further 2.25 dB increase in maximum gain attained by adding the C-shaped strip. For validation, prototypes of the two antennas were fabricated and tested. The predicted and measured results showed reasonable agreement and the results confirmed good impedance bandwidth characteristics for UWB operation from both proposed balanced antennas.

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Balanced dual-segment cylindrical dielectric resonator antennas for ultra-wideband applications

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